The 4th Asian Concrete Federation Symposium on Emerging Technologies for Structural Longevity (ACF2023- ETSL)

300 / 2023-02-28 14:20:06

Valorization of Waste Glass in Low Carbon Products

Waste glass;,Glass powder,Low carbon,Cement-based materials,Lightweight aggregate

Abstract: In Hong Kong, the waste glass is a nonnegligible component among municipal solid wastes, but the recycling rate of waste glass is usually lower than 20% due to the lack of recycling outlets. Glass is a silica-rich solid waste with high strength and low permeability, which provides advantages in the application in cement-based materials. This paper reviews the research outcomes on the development of low-carbon building materials incorporating waste glass in Hong Kong, with a view to creating new approaches on the use of waste glass in the cement-based materials. The waste glass in the forms of glass powder, glass aggregates and glass-based alkali activator was used for the development of architectural mortar, dry-mixed concrete and alkali activated materials. Furthermore, the waste glass was combined with other solid wastes to produce lightweight aggregates for lightweight concrete.